Removed default TennisKataTests file
Initial GameTests
Return Love-Love at the start of the game
Fifteen-Love when Player 1 scores
Thirty-Love when Player 1 scores twice
Refactored getScore() to look up tennis score from a Dictionary
Forty-Love when Player 1 scores thrice
Love-Fifteen when Player 2 scores
Initial Player
Return 0 if Player has not scored
Return 1 when Player scores
Return 2 when Player scores twice
Start using Player in our game

We simply create Players and then add them to the game, retaining our
existing methods `scorePlayer1()` and `scorePlayer2()`.

I couldn't init Game() from within `setUp()`, and I couldn't refer to
the Player instances when I'm init Game.  I had to add a no-arg
constructor just to set things up properly.
Removed scorePlayer1() and scorePlayer2()